I got an answer on the Infor Communities page so thought I'd share here...

you might be better off selecting by EntryCategory = 5 (which is "Data Sources", according to the ENPCategories table). And yes, the actual data source definition is stored in the ATTRBINARYVALUE, which you can access by a bit of casting:
SELECT cast(substring(attrbinaryvalue,1, 500) as varchar(500)) from ENPTREEATTRS
WHERE entrycategory = 5

Here's the query that @Elliott came up with to help me out:

with CS (ConnectionString) as
(
select cast(cast(substring(attrbinaryvalue,1,550) as varchar(550)) as xml) as ConnectionString
from LawsonSN.dbo.ENPTREEATTRS
where attrcategory = 5
)
select
--CS.ConnectionString
CS.ConnectionString.value('(/data_connection/name)[1]','varchar(50)') as DBName
,CS.ConnectionString.value('(/data_connection/jdbc_url)[1]','varchar(150)') as JDBCURL
,CS.ConnectionString.value('(/data_connection/jdbc_database)[1]','varchar(50)') as JDBCDatabase
,CS.ConnectionString.value('(/data_connection/jdbc_user)[1]','varchar(50)') as JDBCUser
from CS